I happened to love this episode! No, it doesn't really get us any closer to meeting the mother. But, I think what fans have come to love about this show is that it deals with real life questions. This episode takes a look at what happens when the first couple in a group of friends starts having kids. And, we had some fun along the way! I think Ted needed this episode to remember what he really wants in life. And, I think he's getting closer to realizing Victoria isn't it.
All in all, a funny and heart-felt episode. Even with no mention of the "mother".